Support new "spin" gem for auto-test

The new "spin" gem (discussed on Ruby5: http://ruby5.envylabs.com/episodes/223-episode-219-november-1st-2011/stories/1966-give-your-tests-a-spin) would be great for the "auto-test" feature.

https://github.com/jstorimer/spin

Currently, in a modest spec file of 51 tests, auto-test takes 20sec per change to run all the tests. A chunk of that is just the startup.

Can support for this be added to Rubymine?